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Magnetic-core memory

Index Magnetic-core memory

Magnetic-core memory was the predominant form of random-access computer memory for 20 years between about 1955 and 1975. [1]

98 relations: An Wang, Apollo Guidance Computer, Apple II, Areal density (computer storage), Aspirin, Bit, Bubble memory, Byte (magazine), Calculator, Cathode ray tube, CDC 6600, Ceramic, Commodore 64, Computer data storage, Computer History Museum, Computer memory, Core dump, Core rope memory, Delay line memory, Digital Equipment Corporation, Drum memory, Dynamic random-access memory, East Asia, Electric current, Electrical engineering, Electromagnetic induction, Electromagnetic pulse, ENIAC, Ferranti Mercury, Ferrimagnetism, Ferrite (magnet), Ferroelectric RAM, Fighter aircraft, Harvard University, Hertz, IBM, IBM 1620, IBM 702, IBM 7030 Stretch, IBM 704, IBM 7090, Integrated circuit, Intel 1103, J. Presper Eckert, Jan A. Rajchman, Jay Wright Forrester, Jeffrey Chuan Chu, Ken Olsen, Magnetic core, Magnetic field, ..., Magnetic hysteresis, Magnetoresistive random-access memory, Microsecond, MOBIDIC, Moore School of Electrical Engineering, MOSFET, Nanosecond, Non-volatile memory, Operating temperature, Parallel computing, PDP-1, Percussive maintenance, Physicist, Programmable logic controller, Programmed Data Processor, Random access, Random-access memory, RCA, Read-only memory, Real-time computing, Relay logic, Remanence, Seeburg Corporation, Selectron tube, Semiconductor, Semiconductor memory, Shanghai, Shift register, Shmoo, Shmoo plot, Signal Corps (United States Army), Space Shuttle, Space Shuttle Challenger, Spacecraft, Static random-access memory, Thermistor, Thin-film memory, Toroid, Transformer, Transistor, Twistor memory, United States, Vacuum tube, Wang Laboratories, Whirlwind I, Williams tube, Word (computer architecture), 32-bit. Expand index (48 more) »

An Wang

An Wang (February 7, 1920 – March 24, 1990) was a Chinese–American computer engineer and inventor, and co-founder of computer company Wang Laboratories, which was known primarily for its dedicated word processing machines.

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Apollo Guidance Computer

The Apollo Guidance Computer (AGC) was a digital computer produced for the Apollo program that was installed on board each Apollo Command Module (CM) and Lunar Module (LM).

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Apple II

The Apple II (stylized as Apple.

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Areal density (computer storage)

Areal density is a measure of the quantity of information bits that can be stored on a given length of track, area of surface, or in a given volume of a computer storage medium.

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Aspirin, also known as acetylsalicylic acid (ASA), is a medication used to treat pain, fever, or inflammation.

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The bit (a portmanteau of binary digit) is a basic unit of information used in computing and digital communications.

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Bubble memory

Bubble memory is a type of non-volatile computer memory that uses a thin film of a magnetic material to hold small magnetized areas, known as bubbles or domains, each storing one bit of data.

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Byte (magazine)

Byte was an American microcomputer magazine, influential in the late 1970s and throughout the 1980s because of its wide-ranging editorial coverage.

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An electronic calculator is typically a portable electronic device used to perform calculations, ranging from basic arithmetic to complex mathematics.

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Cathode ray tube

The cathode ray tube (CRT) is a vacuum tube that contains one or more electron guns and a phosphorescent screen, and is used to display images.

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CDC 6600

The CDC 6600 was the flagship of the 6000 series of mainframe computer systems manufactured by Control Data Corporation.

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A ceramic is a non-metallic solid material comprising an inorganic compound of metal, non-metal or metalloid atoms primarily held in ionic and covalent bonds.

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Commodore 64

The Commodore 64, also known as the C64 or the CBM 64, is an 8-bit home computer introduced in January 1982 by Commodore International (first shown at the Consumer Electronics Show, in Las Vegas, January 7–10, 1982).

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Computer data storage

Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media that are used to retain digital data.

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Computer History Museum

The Computer History Museum (CHM) is a museum established in 1996 in Mountain View, California, US.

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Computer memory

In computing, memory refers to the computer hardware integrated circuits that store information for immediate use in a computer; it is synonymous with the term "primary storage".

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Core dump

In computing, a core dump, crash dump, memory dump, or system dump consists of the recorded state of the working memory of a computer program at a specific time, generally when the program has crashed or otherwise terminated abnormally.

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Core rope memory

Core rope memory is a form of read-only memory (ROM) for computers, first used in the 1960s by early NASA Mars space probes and then in the Apollo Guidance Computer (AGC) designed and programmed by the Massachusetts Institute of Technology (MIT) Instrumentation Lab and built by Raytheon.

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Delay line memory

Delay line memory is a form of computer memory, now obsolete, that was used on some of the earliest digital computers.

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Digital Equipment Corporation

Digital Equipment Corporation, also known as DEC and using the trademark Digital, was a major American company in the computer industry from the 1950s to the 1990s.

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Drum memory

Drum memory was a magnetic data storage device invented by Gustav Tauschek in 1932 in Austria.

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Dynamic random-access memory

Dynamic random-access memory (DRAM) is a type of random access semiconductor memory that stores each bit of data in a separate tiny capacitor within an integrated circuit.

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East Asia

East Asia is the eastern subregion of the Asian continent, which can be defined in either geographical or ethno-cultural "The East Asian cultural sphere evolves when Japan, Korea, and what is today Vietnam all share adapted elements of Chinese civilization of this period (that of the Tang dynasty), in particular Buddhism, Confucian social and political values, and literary Chinese and its writing system." terms.

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Electric current

An electric current is a flow of electric charge.

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Electrical engineering

Electrical engineering is a professional engineering discipline that generally deals with the study and application of electricity, electronics, and electromagnetism.

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Electromagnetic induction

Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field.

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Electromagnetic pulse

An electromagnetic pulse (EMP), also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy.

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ENIAC (Electronic Numerical Integrator and Computer) was amongst the earliest electronic general-purpose computers made.

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Ferranti Mercury

The Mercury was an early commercial computer from the mid-1950s built by Ferranti.

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In physics, a ferrimagnetic material is one that has populations of atoms with opposing magnetic moments, as in antiferromagnetism; however, in ferrimagnetic materials, the opposing moments are unequal and a spontaneous magnetization remains.

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Ferrite (magnet)

A ferrite is a ceramic material made by mixing and firing large proportions iron(III) oxide (Fe2O3, rust) blended with small proportions of one or more additional metallic elements, such as barium, manganese, nickel, and zinc.

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Ferroelectric RAM

Ferroelectric RAM (FeRAM, F-RAM or FRAM) is a random-access memory similar in construction to DRAM but using a ferroelectric layer instead of a dielectric layer to achieve non-volatility.

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Fighter aircraft

A fighter aircraft is a military aircraft designed primarily for air-to-air combat against other aircraft, as opposed to bombers and attack aircraft, whose main mission is to attack ground targets.

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Harvard University

Harvard University is a private Ivy League research university in Cambridge, Massachusetts.

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The hertz (symbol: Hz) is the derived unit of frequency in the International System of Units (SI) and is defined as one cycle per second.

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The International Business Machines Corporation (IBM) is an American multinational technology company headquartered in Armonk, New York, United States, with operations in over 170 countries.

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IBM 1620

The IBM 1620 was announced by IBM on October 21, 1959, and marketed as an inexpensive "scientific computer".

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IBM 702

The IBM 702 was IBM's response to the UNIVAC—the first mainframe computer using magnetic tapes.

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IBM 7030 Stretch

The IBM 7030, also known as Stretch, was IBM's first transistorized supercomputer.

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IBM 704

The IBM 704, introduced by IBM in 1954, is the first mass-produced computer with floating-point arithmetic hardware.

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IBM 7090

The IBM 7090 is a second-generation transistorized version of the earlier IBM 709 vacuum tube mainframe computers that was designed for "large-scale scientific and technological applications".

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Integrated circuit

An integrated circuit or monolithic integrated circuit (also referred to as an IC, a chip, or a microchip) is a set of electronic circuits on one small flat piece (or "chip") of semiconductor material, normally silicon.

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Intel 1103

The 1103 is a dynamic random-access memory (DRAM) integrated circuit (IC) developed and fabricated by Intel.

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J. Presper Eckert

John Adam Presper "Pres" Eckert Jr. (April 9, 1919 – June 3, 1995) was an American electrical engineer and computer pioneer.

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Jan A. Rajchman

Jan Aleksander Rajchman (London, 10 August 1911 – 1 April 1989) was a Polish electrical engineer and computer pioneer.

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Jay Wright Forrester

Jay Wright Forrester (July 14, 1918 – November 16, 2016) was a pioneering American computer engineer and systems scientist.

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Jeffrey Chuan Chu

Jeffrey Chuan Chu (朱傳榘) (July 14, 1919 – June 6, 2011), born in Tianjin, Republic of China, was a pioneer computer engineer.

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Ken Olsen

Kenneth Harry "Ken" Olsen (February 20, 1926 – February 6, 2011) was an American engineer who co-founded Digital Equipment Corporation (DEC) in 1957 with colleague Harlan Anderson and his brother Stan Olsen.

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Magnetic core

A magnetic core is a piece of magnetic material with a high magnetic permeability used to confine and guide magnetic fields in electrical, electromechanical and magnetic devices such as electromagnets, transformers, electric motors, generators, inductors, magnetic recording heads, and magnetic assemblies.

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Magnetic field

A magnetic field is a vector field that describes the magnetic influence of electrical currents and magnetized materials.

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Magnetic hysteresis

Magnetic hysteresis occurs when an external magnetic field is applied to a ferromagnet such as iron and the atomic dipoles align themselves with it.

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Magnetoresistive random-access memory

Magnetoresistive random-access memory (MRAM) is a non-volatile random-access memory technology available today that began its development in mid-1980s.

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A microsecond is an SI unit of time equal to one millionth (0.000001 or 10−6 or 1/1,000,000) of a second.

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Sylvania's MOBIDIC, short for "MOBIle DIgital Computer", was a transistorized computer intended to store, sort and route information as one part of the United States Army's Fieldata concept.

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Moore School of Electrical Engineering

The Moore School of Electrical Engineering at the University of Pennsylvania came into existence as a result of an endowment from Alfred Fitler Moore on June 4, 1923.

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MOSFET showing gate (G), body (B), source (S) and drain (D) terminals. The gate is separated from the body by an insulating layer (white). surface-mount packages. Operating as switches, each of these components can sustain a blocking voltage of 120nbspvolts in the ''off'' state, and can conduct a continuous current of 30 amperes in the ''on'' state, dissipating up to about 100 watts and controlling a load of over 2000 watts. A matchstick is pictured for scale. A cross-section through an nMOSFET when the gate voltage ''V''GS is below the threshold for making a conductive channel; there is little or no conduction between the terminals drain and source; the switch is off. When the gate is more positive, it attracts electrons, inducing an ''n''-type conductive channel in the substrate below the oxide, which allows electrons to flow between the ''n''-doped terminals; the switch is on. Simulation result for formation of inversion channel (electron density) and attainment of threshold voltage (IV) in a nanowire MOSFET. Note that the threshold voltage for this device lies around 0.45 V The metal-oxide-semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET) is a type of field-effect transistor (FET), most commonly fabricated by the controlled oxidation of silicon.

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A nanosecond (ns) is an SI unit of time equal to one thousand-millionth of a second (or one billionth of a second), that is, 1/1,000,000,000 of a second, or 10 seconds.

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Non-volatile memory

Non-volatile memory (NVM) or non-volatile storage is a type of computer memory that can retrieve stored information even after having been power cycled.

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Operating temperature

An operating temperature is the temperature at which an electrical or mechanical device operates.

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Parallel computing

Parallel computing is a type of computation in which many calculations or the execution of processes are carried out concurrently.

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The PDP-1 (Programmed Data Processor-1) is the first computer in Digital Equipment Corporation's PDP series and was first produced in 1959.

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Percussive maintenance

No description.

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A physicist is a scientist who has specialized knowledge in the field of physics, which encompasses the interactions of matter and energy at all length and time scales in the physical universe.

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Programmable logic controller

A programmable logic controller (PLC), or programmable controller is an industrial digital computer which has been ruggedized and adapted for the control of manufacturing processes, such as assembly lines, or robotic devices, or any activity that requires high reliability control and ease of programming and process fault diagnosis.

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Programmed Data Processor

Programmed Data Processor (PDP), referred to by some customers, media and authors as "Programmable Data Processor, is a term used by the Digital Equipment Corporation from 1957 to 1990 for several lines of minicomputers.

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Random access

In computer science, random access (more precisely and more generally called direct access) is the ability to access any item of data from a population of addressable elements roughly as easily and efficiently as any other, no matter how many elements may be in the set.

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Random-access memory

Random-access memory (RAM) is a form of computer data storage that stores data and machine code currently being used.

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The RCA Corporation was a major American electronics company, which was founded as the Radio Corporation of America in 1919.

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Read-only memory

Read-only memory (ROM) is a type of non-volatile memory used in computers and other electronic devices.

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Real-time computing

In computer science, real-time computing (RTC), or reactive computing describes hardware and software systems subject to a "real-time constraint", for example from event to system response.

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Relay logic

Relay logic is a method of implementing combinational logic in electrical control circuits by using several electrical relays wired in a particular configuration.

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Remanence or remanent magnetization or residual magnetism is the magnetization left behind in a ferromagnetic material (such as iron) after an external magnetic field is removed.

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Seeburg Corporation

Seeburg was an American design and manufacturing company of automated musical equipment, such as orchestrions, jukeboxes, and vending equipment.

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Selectron tube

The Selectron was an early form of digital computer memory developed by Jan A. Rajchman and his group at the Radio Corporation of America (RCA) under the direction of Vladimir K. Zworykin.

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A semiconductor material has an electrical conductivity value falling between that of a conductor – such as copper, gold etc.

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Semiconductor memory

Semiconductor memory is a digital electronic data storage device, often used as computer memory, implemented with semiconductor electronic devices on an integrated circuit (IC).

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Shanghai (Wu Chinese) is one of the four direct-controlled municipalities of China and the most populous city proper in the world, with a population of more than 24 million.

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Shift register

In digital circuits, a shift register is a cascade of flip flops, sharing the same clock, in which the output of each flip-flop is connected to the 'data' input of the next flip-flop in the chain, resulting in a circuit that shifts by one position the 'bit array' stored in it, 'shifting in' the data present at its input and 'shifting out' the last bit in the array, at each transition of the clock input.

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The shmoo (plural: shmoon, also shmoos) is a fictional cartoon creature created by Al Capp (1909–79); the character first appeared in its classic comic strip Li'l Abner on August 31, 1948.

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Shmoo plot

In electrical engineering, a shmoo plot is a graphical display of the response of a component or system varying over a range of conditions or inputs.

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Signal Corps (United States Army)

The United States Army Signal Corps (USASC) develops, tests, provides, and manages communications and information systems support for the command and control of combined arms forces.

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Space Shuttle

The Space Shuttle was a partially reusable low Earth orbital spacecraft system operated by the U.S. National Aeronautics and Space Administration (NASA), as part of the Space Shuttle program.

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Space Shuttle Challenger

Space Shuttle Challenger (Orbiter Vehicle Designation: OV-099) was the second orbiter of NASA's space shuttle program to be put into service, after ''Columbia''.

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A spacecraft is a vehicle or machine designed to fly in outer space.

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Static random-access memory

Static random-access memory (static RAM or SRAM) is a type of semiconductor memory that uses bistable latching circuitry (flip-flop) to store each bit.

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A thermistor is a type of resistor whose resistance is dependent on temperature, more so than in standard resistors.

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Thin-film memory

Thin-film memory is a high-speed variation of core memory developed by Sperry Rand in a government-funded research project.

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In mathematics, a toroid is a surface of revolution with a hole in the middle, like a doughnut, forming a solid body.

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A transformer is a static electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

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A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power.

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Twistor memory

Twistor is a form of computer memory formed by wrapping magnetic tape around a current-carrying wire.

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United States

The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.

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Vacuum tube

In electronics, a vacuum tube, an electron tube, or just a tube (North America), or valve (Britain and some other regions) is a device that controls electric current between electrodes in an evacuated container.

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Wang Laboratories

Wang Laboratories was a computer company founded in 1951, by An Wang and G. Y. Chu.

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Whirlwind I

Whirlwind I was a Cold War-era vacuum tube computer developed by the MIT Servomechanisms Laboratory for the U.S. Navy.

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Williams tube

The Williams tube, or the Williams–Kilburn tube after inventors Freddie Williams (26 June 1911 – 11 August 1977), and Tom Kilburn (11 August 1921 – 17 January 2001), is an early form of computer memory.

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Word (computer architecture)

In computing, a word is the natural unit of data used by a particular processor design.

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32-bit microcomputers are computers in which 32-bit microprocessors are the norm.

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Core Memory, Core memory, Core store, Ferrite core memory, Ferrite ram, Ferrite-core memory, Magnetic core memory, Magnetic core storage, Magnetic-Core Storage, Main store.


[1] https://en.wikipedia.org/wiki/Magnetic-core_memory

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